SH7046 Datasheet, PDF (425/611 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7046 Series

CK
ADTRG
Section 13 A/D Converter
External trigger
signal
ADST
A/D conversion
Figure 13.3 External Trigger Input Timing
13.5 Interrupt Sources and DTC Transfer Requests
The A/D converter generates an A/D conversion end interrupt (ADI) upon the completion of A/D
conversion. ADI interrupt requests are enabled when the ADIE bit is set to 1 while the ADF bit in
ADCSR is set to 1 after A/D conversion is completed. The data transfer controller (DTC) can be
activated by an ADI interrupt. Having the converted data read by the DTC in response to an ADI
interrupt enables continuous conversion to be achieved without imposing a load on software.
The A/D converter can generate an A/D conversion end interrupt request. The ADI interrupt can
be enabled by setting the ADIE bit in the A/D control/status register (ADCSR) to 1, or disabled by
clearing the ADIE bit to 0. The DTC can be activated by an ADI interrupt. In this case an interrupt
request is not sent to the CPU.
When the DTC is activated by an ADI interrupt, the ADF bit in ADCSR is automatically cleared
when data is transferred by the DTC.
Table 13.5 A/D Converter Interrupt Source
Name
ADI
Interrupt Source
A/D conversion completed
Interrupt Source Flag
ADF
DTC Activation
Possible
Rev. 4.00 Dec 05, 2005 page 381 of 564
REJ09B0270-0400